Pump



W. B. HEW-ITT.

' PUMP.

P i l I .l 1,331,504. A PLICATION FILED OCT 30 1915 Patented Feb. 24,

2 SHEETS-Snam 1.'

w. BpHEwlTT.

PUMP.

APPLICATION FILED OCT. 30, I9l5. 1,381,504. Patented Feb. 24,1920.

2 SHEETS-SHEEI 2.

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MENTS, To woRTHINGroN PUMP AND MACHINERY CORPORATION, or NRW' YORK vice,because of UNITED STATES` PATENT OFFICE.

N'. Y., A` CORPORATION OF VIRGINIA.

PUMP.

To all whom z't may concern.' Y

Be it known that I, WILLIAM B. HEWITT, a citizen of the UnitedStates,'residing at Holyoke, county of Hampden, and State ofMassachusetts, `have invented certain new and useful Improvements inPumps, fully described and represented in the following specificationand the accompanying drawings forming a part of the same. i

This yinvention relates tothat class of pumps used especially for thetransportation of oil through pipe lines. 'In this servthe necessity forcontinuous operation, the penetrating nature of the material handled,and the factthat pumping plants arelocated in many cases at a greatdistance fromthe base of supply and repair, these pumps must beextremely rugged, simple in construction and with 'their parts readilyaccessible.

Thel especial object of this invention is I the production of a pump ofthis class which shall meet these requirements with approximatelystraight ,direct flow of the oil through the pump, small clearances and,large valve area, whereby higher plunger velocities 'may be obtained andtortuous passages and large Aclearance spaces be avoided. For use with apump of this kind a special valve construction has been developed inwhich the valve parts are readily accessible and easily remfvable, andthis forms in itself a specific feature of the invention.

In the accompanying drawings forming a part 0f this specification an oilline pump embodying all the features of the invention in their preferredform is shown,and this construction will now be described in detail andthe features forming the invention then specifically pointed out in theclaims.

In the drawings- Figure 1 is a side elevation, tion, to show thestruction;

Fig. 2 is a plan view showingpa two pump construction. j I

Fig 3 is a section on the line 3-3 of Fig. 1, showing the' valveconstruction in detail;

Fig. 4 is asimilar view showing a modi fied valveQconstruction.

Referring tothe drawings, A is the pump head frame carrying crank-shaftB shown cylinder and valve con- Specication of Letters Patent.Application filed oeteber so, 1915.

with the suction and covers are partly in sec- 'of the bolt 3.

seat.

Patented Feb. 24, 1920. Serial No. 58,776.

rods 15. Suitable cradles 16 with cross-head guides are provided. Thepump cylinder is made up onf two pump cylinder sections 18 having thelrforce chambers 24'integral with the cylinders,the cylinders being boltedtogether at their force chamber ends, and provided` with flanges 19 forconnection to the cradles 16, the usual outside packed plunger lglands20`being shown. 18 with their individual valve chambers are castintegral and the cylinders are interchangeable. A common suctionbreeches 21 forms thersuction chamber for the inlets 22 of the twocylinder sections and connects pipe line 23. The suction valves 29preferably open into the cylinder beyond vthe plunger stroke, thusreducing the clearance. The force chamber 24 has discharge ports 25 forthe pump cylinders controlled by discharge valves 30, and dischargeopenings 26 connected by common discharge pipe '27 to the discharge pipeline 28. The discharge ports 25 are slightly larger than the suctionports 22 and are in alinement therewith. Suitable hand holes providedabove the discharge valves to provide a ready access to the valves.

Fig. 3 shows a'valve construction well adapted for use in a pump of thiskind, in which 22 and 25 are, respectively, the suction and dischargeports having valve seats l and 2 mounted therein. Through the valveseats passes a heavy rod or bolt 3 which also passes throu h the bottomof the Cylinder sections suction chamber 2l and 1s secured by cap nut 4.Below the valve seat 14 the bolt 3 carries collar 6. Suction valve 29moves upon a hollow valve stem 7 provided with a head 8 screwthreaded onthe threaded portion 5 A spring 9 between. the valve 8 presses the valveupon its The discharge valve construction is identical with that of thesuction valve7 eX- cept that the valve stem for the discharge valve isprovided with a loop 10 above the nut portion to enable the entire valveconand the head stru'ction to 'be withdrawn `from the pump of the valvecap 34 and passes cylinder upon the release of cap nut 4.

Fig. 4 shows a variation of the valve construction shown in Fig. 3, inwhich 1 and 2 are respectively the suction and discharge valve seats.Upon the valve seats 1 and 2 are seated, respectively, suction and dis-`charge valves formed of ball valves 31, 32, and caps 34, 35. A rod-orbolt 36 screw threaded on each end is screwed into the top through thevalve seat 2 and cap 35, and is capped by a cap nut 37. Into the bottomof the valve cap 34 is screwed a rod or bolt 38 carrying a collar 6. Acollar nut 39 passes through stuing boX 40 in the bottom of the suctionchamber 21 and engages the screw threaded end of the bolt 38.

It will be seen that the valve mounting provides for the convenientremoval of the discharge valve andits seat independently of thesuctionvalve and its seat, that both .the valves and their seats may be removedsuccessively without removing the rod on which the partsarevlmounted,and that by removing the cap `nut`4 of Fig. 3 or unscrew ing the'nut 39rom'rod 380iL Fig. 4, the entire valve and valve seat construction maybe removed as a lunit with the rod. In the it will be seen that withoutremoving they nut39 and its pack ing40, so that the suction 'chamber 21is not opened by the removal ofthe rod. Ihe-entire valve and valve seatconstruction can thus be removed without draining the sucp v secured onthe rod for holding-the rod in tion chamber. l Y

The pump construction is very simple manufacture, requires a minimum ofcare' in :foundry work, 'assuresa leak-proofl casting by the integralvalve chambers and the cylinder sections are readily interchan eable.The distance from lthe floor to the un' erside of the discharge valve isminimized thereby materially reducing' the total suction `lift from thatvused in the ordinary type of pot valve where the discharge valves arelocated, high above the oil cylinder. p The simplicity of the cylinderksection casting is increased by the separate valve seats, eliminatingthe likelihood of breakage and increasing the accessibility of `all 'thevalve parts for removal. l v

What I claim is:

1. A double acting center discharge pump having a cylinder formed 4oftwo cylinder sectionsneach-cylinder section formedin a single castingwith itsvalve chamber in line with the plunger and beyond the plungermovement, and suction and discharge ports in the valve chamber ends ofthe cylinder sections.

2. A 'double acting center discharge pump having a cylinder formed, oftwo cylinder sections, each cylinder section formed in abe withdrawnsingle casting with its valve chamber in line with the plunger andbeyond the plunger movement and the sections being bolted t0- lgetherat` their valve cham'ber ends, and a the discharge ports and beyond theplunger movement.

4. A pump having a cylinder formed or i two cylinder sections, eachcylinder section and its discharge chamber formed in a single castingand bolted together at their discharge chamber ports in the dischargechamber ends of t e ends, suction and dischar e v cylinder sections andbeyond the plunger 4 movement, suction valves mounted to open inside.the cylinder sections opposite the discharge ports and beyond theplunger movement, and suction and discharge valve seats and valvesconnected together to be in- A serted and removed as a unit. preferredconstruction shown in Fig. 4,' also,

lrod 38' may be released 5. A pump cylinder having a valve chamberintegral therewith, suction and discharge valve seats formed se arately'from the cylinder yandarranged in ine with each other, suction anddischarge valves, a valve rod on which the suction and discharge valvesand valve seats are mounted, devices place and engaging the valves andvalve seats thereon, arranged for the removal of one valve and itsseat'from the rod while retaining the other valveand or removing bothvlaves from the rod successively, andI removable holding devices for therod whereby the rod with the valve and valve seats thereon may fromthevalve chamber.

6. A pumppcylinderhaving a valve chamber integral therewith, .suctionand discharge valve seats formed separately from the cylinder andarranged vertically in line with each other with thesuction valve seat.'lbelow, suction and discharge valves, a valve rod on which the suctionand discharge valves and valve seats are mounted, devices for holdingthe rod in place and engaging the valves and valve seats thereonarranged for the removal of the discharge valve and its seat from therod while retaining the suction valve and its seat in place or removingboth valves and their seats from the rod successively, and holdingdevices for securing the lower end of the rod in the suction chamberwall, including a packing device arranged to release the,I rod withoutpermitits seat in place A and their seats ting escape of fluid, wherebythe "rod with the valves and valve seats thereon maybe withdrawn fromthe valve chamber without draining the suction chamber.

7. A valve chamber having suction and' discharge valve seats setthereinin line with each other, a rod on which the valve seats are mounted,suction and discharge valves mounted on the rod, independently removableholding devices secured on the rod for the discharge valve and for thesuction valve whereby one of the valves and its seat may beremoved fromthe rod independently of the other or both valves may be removedsuccessively, and removable holding devices for securing the rod inplace whereby the rod may be removed with both the valves and theirseats thereon.

8. A valve chamber having suction and discharge valve seats set thereinin line with each other, a rod on which the valve seats are mounted,suction and discharge ,valves mounted on the rod, independentlyremovable holding devices on the rod for the discharge valve and for thesuction valve whereby the discharge valve and its seat may be removedupward from the rod independently of the suction valve and its seat orboth valves and their seats may be removed successively, and removableholding devices for securing the rod in place in the suction chamberwall including a packing device arranged to release the rod withoutpermitting escape of fluid from the suction chamber, whereby the rod maybe moved with both valves and their seats thereon without draining thesuctionrhamber.

l 9. `A valve chamber having suction and discharge valve seats andvalves therein in line with each other, a rod on which the valves andvalve seats are mounted, holding devices for the valves on the rod, andLholding 'devices for securing the rod in place in the suction chamberwall including a packing device arranged to release the rod withoutpermitting escape of fluid from the suction chamber, whereby the rod maybe removed with both valves and their seats lt)hereon without drainingthe suction cham- In testimony my hand in the witnesses.

whereof, I have hereunto set presence of two subscribing WILLIAM B.HEWITT. Witnesses:

WALTER D. HANLEY, THos. NEIL.

